Ignition Coil & Iridium Spark Plugs for Lexus IS250 IS250C (2005-2023) 2.5L V6

High-Output Ignition Coil & Iridium Spark Plug Kit for 2005-2023 Lexus IS

This direct-replacement ignition coil and iridium spark plug package resolves misfires and restores combustion efficiency for the 2.5L V6.

The Stock 4GR-FSE Ignition Shortcoming

Over time, the factory ignition coils on the Lexus IS 2.5L V6 suffer from thermal degradation due to their placement in the tightly packaged engine bay. Repeated heat cycling breaks down the internal epoxy potting and primary windings, leading to increased electrical resistance, weak spark generation, and eventual cross-firing. This degradation typically manifests as rough idling, hesitation under load, poor fuel economy, and cylinder misfire codes (P0300-P0306). These ignition failures are especially detrimental when paired with the carbon buildup commonly experienced in the direct-injected 4GR-FSE engine.

The Engineering Solution

This complete ignition overhaul kit addresses factory weaknesses by utilizing upgraded primary and secondary internal copper windings, which improve voltage output and reduce internal operating temperatures. The coils feature a high-dielectric epoxy resin to prevent voltage leaks and resist heat soak, ensuring consistent spark energy delivery even under extreme engine loads. Paired with matched fine-wire iridium spark plugs, this kit maximizes combustion efficiency, delivering up to a 15% increase in spark energy. The iridium center electrodes provide exceptional durability and lower the voltage requirement for spark propagation, resulting in smoother idle, faster throttle response, and reliable cold starts while meeting or exceeding strict OEM standards.

Technical Specifications

Compatibility

• 2005-2023 Lexus IS250 2.5L V6
• 2005-2023 Lexus IS250C 2.5L V6

The Lexus Precision Standard

Engineered for the rigorous demands of Japanese luxury platforms, this matched ignition kit guarantees precise engine timing and zero CEL (Check Engine Light) issues, ensuring your JDM powerplant runs reliably with optimal power output.